<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Vue</title>
    <!--引入Vue-->
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <!--数据代理：通过一个对象代理对另一个对象中属性的操作(读/写)-->
    <script type="text/javascript">
        let obj={x:100}
        let obj2={y:200}

        Object.defineProperty(obj2,'x',{
            get(){
                return obj.x;
            },
            set(value){
                return obj.x=value;
            }

        })
    </script>
</body>
</html>